The value of tmnxIPsecIsaGrpTunnelReassembly specifies the maximum
number of seconds to wait to receive all fragments of a particular
IPSec or GRE packet for reassembly.
The tmnxGreTunnelReassembly value set to zero indicates that
reassembly is disabled.
An 'inconsistentValue' error is retuned if the value is not a multiple
of 100 milli-seconds.